It may not be scientific, but this test has saved me hundreds of hours of diagnostic time, and saved customers thousands of dollars.Customers always say "I just put that gas in there;it's fresh". Well it might be fresh outta the jug that's been in your garage all winter! But If it's got color, it is "no good" for a carb equipped engine.
Thanks for the great info. This is something I didn't pay much thought too. In the clear filter window the gas is clearly turning to orange. Ill have to drain it and fill up with some higher octane.